Question

当我将文件上传到S3时，突然上传为0字节。

我不确定为什么这会突然发生，因为它之前的工作正常。这是我的代码：

def store_in_s3_avatar(pathtofile, avatarimage, filename, user):
    conn = S3Connection(settings.AWS_ACCESS_KEY_ID, settings.AWS_SECRET_ACCESS_KEY)
    b = conn.create_bucket('mybucket')
    mime = mimetypes.guess_type(filename)[0]
    k = Key(b)
    k.key = "/media/avatars/%s/%s" % (user,filename)
    k.set_metadata("Content-Type", mime)
    k.set_contents_from_string(avatarimage)
    k.set_acl("public-read")
    return pathtofile

以下是调用此函数的views.py片段：

 if request.method == "POST":
        updated = False
        if 'avatar' in request.FILES:
            path = avatar_file_path(user=request.user, 
                filename=request.FILES['avatar'].name)
            avatar = Avatar(
                user = request.user,
                primary = True,
                avatar = path,
            )
            new_file = avatar.avatar.storage.save(path, request.FILES['avatar'])
            avatarcontent = request.FILES['avatar']
            filename = request.FILES['avatar'].name
            avatarimage = avatarcontent.read()
            user=request.user
            avatar.avatar = store_in_s3_avatar(path, avatarimage, filename, user)
            avatar.save()
            ...

Answer 1

根据您描述的行为，我打赌文件指针在最后，因为您只是明确地调用了storage.save()函数。通过两次读取文件，你什么也得不到。

f = StringIO.StringIO('foobar')
f.read() # out 'foobar'
f.read() # out ''
f.seek(0) 
f.read() # out 'foobar'

0字节上传到Django应用程序中的Amazon S3

1 个答案: